Enhance color Palette in Lightroom

Color palette in LR brush: I recently had to paint walls on a photo... and it was not easy to use the color palette to locate the ideal color. I;d love to see this expanded
1) Sample dropper - which also returns the RBG code
2) enter RGB code

also - hard to find and use grey scales on this palette

my suggestion -enhance the color palette on LR under the brush and elsewhere as applicable. thanks!

1. Already there - Select the color swatch, hold down the mouse button on the colors and drag the eye dropper to anywhere on the screen.

2. RGB values (0-255) aren't used in Lightroom (except in soft-proofing 8 bit color profiles). It uses RGB percentages because it is not an 8Bit per channel color space and the traditional RGB values don't have enough granularity.

Also - gray scales are not part of the color palette because gray scale is just another way of saying exposure in the adjustment brush world. . If you want White you add a lot of exposure, if you want black you take away a lot of exposure.